Browsing Institutt for geovitenskap og petroleum by Title
Now showing items 1448-1467 of 2560
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Mineral Magnetic Characterization of High-Latitude Sediments From Lake Levinson-Lessing, Siberia
(Peer reviewed; Journal article, 2021)Levinson-Lessing Lake in northern Central Siberia is a sedimentary archive characterized by continuous, widely constant sedimentation at high rates (0.7 m ka−1 for >32 ka). This study provides the first evidence of the ... -
Mineralogical and textural characterization for increased iron oxide recovery. Exemplified on the Storforshei iron formation
(Doctoral theses at NTNU;2019:309, Doctoral thesis, 2019)Process mineralogy is increasingly becoming an important part of quality control in mining operations, and chemical assays are not sufficient for predicting metallurgical performance of complex ore deposits. Knowledge of ... -
Mineralogical assessment of rocks of hydropower tunnels subjected to swelling
(Master thesis, 2022)Vannkraft tunneler lokalisert i svakt og svellende bergmasse er utsatt for stabilitets problemer og kollaps. Samarbeidspartneren Statkraft ønsker å støtte videre forskning som skal identifisere og vurdere svellende mineraler ... -
Mineralogiens betydning for materialbalansen i ulike produktstrømmer ved prosessanlegget til Rana Gruber
(Master thesis, 2018)er enda ikke skrevet -
Mineralogiens betydning for materialbalansen i ulike produktstrømmer ved prosessanlegget til Rana Gruber
(Master thesis, 2019)Dette masterprosjektet ble gjennomført i samarbeid med Rana Gruber for å skaffe innsikt i mineralbalanser i oppredningsprosessen deres for hematitt. Som del av oppgaven ble det tegnet opp et forenklet flytskjema for ... -
Mineralogy and texture of the Storforshei iron formation, and their effect on grindability
(Journal article; Peer reviewed, 2018)Investigating how ore mineralogy and texture affect the recovery from the processing plant is important for any mining operation. The results will assist in production planning and optimising the utilisation of a deposit. ... -
Minimizing Risk by Determining A Safe Mud Weight Window for Offshore Wellbore Construction
(Journal article; Peer reviewed, 2020)Increased requirements for uncertainty analysis have caused a shift in sensitivity assessment, from a deterministic approach to a stochastic process. To ensure wellbore integrity, it’s essential to conduct breakout and ... -
Mining Ground Deformation Estimation Based on Pre-Processed InSAR Open Data—A Norwegian Case Study
(Journal article; Peer reviewed, 2023)Sublevel caving mining causes surface deformation in three distinct zones parallel to the extracted deposit. Most of the published research is focused on the extent of the caved and fracture zones. The extent of the largest, ... -
Mining of deep-seabed nodules using a Coandă-effect-based collector
(Peer reviewed; Journal article, 2023)We present an effective design of a hydraulic, polymetallic nodule collector, which fundamentally depends on the Coandă effect in harvesting nodules. The design was first developed based on 2D numerical simulations conducted ... -
Mitigating Axial Stick-Slip During Connections on a Floating Vessel
(Master thesis, 2020)Det finnes få gode løsninger for å hindre et fluktuerende bunnhullstrykk under koblinger på en flyterigg. MPD-teknologi gjør det mulig å holde et stabilt trykk, men bare dersom borestrengens bevegelse er forutsigbar. Under ... -
Mixing of heterogeneous, high-MgO, plume-derived magmas at the base of the crust in the Central Iapetus Magmatic Province (Ma 610-550): Origin of parental magmas to a global LIP event.
(Peer reviewed; Journal article, 2020)High-MgO (>12 wt%) magmas represent some of the most primary and high temperature melts from mantle plumes. The compositional diversity of high-MgO magmas gained by fractional melting within inhomogeneous mantle sources, ... -
Model for evaluating drilling efficiency based on the concept of Mechanical Specific Energy
(Master thesis, 2016)Systems to increase efficiency during drilling is desirable in order to have more costeffective well operations. This master s thesis studies the possibility to present new information real-time regarding the actual drilling ... -
Model for Kick Tolerance
(Master thesis, 2012)Kick Tolerance is an important factor in the industry, that allows drilling engineers to establish several parameters in the development phase of a well, such as casing depths, open hole lengths, etc. It can also be ... -
Model for Prediction of Cement Sheath Failure
(Master thesis, 2016)In casing design, the casing is required to withstand all loads it is exposed to during the well life. These loads are normally modeled in an industry leading software (ILS), which determines whether the casing can withstand ... -
Model of Hook Load During Tripping Operation
(Master thesis, 2013)Drilling after oil and gas becomes more challenging for every drilled well; deeper, longer, harder, higher temperature, higher pressure and more complex conditions. The equipment requirements and well integrity regulations ... -
Model-Based Gas Lift Optimization for Oil Well Networks Using Python and PROSPER Well Models
(Master thesis, 2023)In the oil industry, continuous flow gas lift is a frequently employed artificial lift technique to boost oil recovery by decreasing bottom hole pressure. By injecting high-pressure gas into the tubing, the oil column can ... -
Model-based optimization of production systems
(Master thesis, 2015)Gas lifted method is one of the artificial lift technique used in the oil and gas industry.This method is applied most in oil well to improve the oil recovery by lowering the bottomhole pressure. Normally in the field there ... -
Modeling alternatives for multiphase boosters, for field performance studies
(Master thesis, 2017)The concept selection for the development of a petroleum field critically depends upon the uncertainties involved in the field performance analysis, and any deviation in the actual field production from the originally ... -
Modeling and Analysis of Liquid Loading Phenomena and Its Impact on Crossflow in Gas Wells Using ROCX and OLGA
(Master thesis, 2023)Denne oppgaven undersøker samspillet mellom reservoar og brønn under væskeopphopning (liquid loading). Det kan oppstå kryss-strømninger mellom reservoarsoner med ulike egenskaper, og denne oppgaven undersøker om ... -
Modeling and characterizing acoustic signals from cavity clouds generated by marine seismic air-gun arrays: Implications for marine mammals
(Doctoral theses at NTNU;2018:239, Doctoral thesis, 2018)Marine seismic air-gun arrays generate not only low-frequency (<∼300 Hz) acoustic waves which benefit seismic imaging, but also high-frequencies up to tens of kilohertz. Although such high-frequencies are much weaker than ...